How severe is CVE-2016-9821?

CVE-2016-9821 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2016-9821 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-9821?

CVE-2016-9821 affects Libav. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-9821?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2016-9821 published?

CVE-2016-9821 was published on 2017-03-01 and last updated on 2026-06-17.

CVE-2016-9821

CVE-2016-9821 is a medium-severity vulnerability in Libav with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-190.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-190
Affected product: Libav
Published: 2017-03-01
Last modified: 2026-06-17

Description

Integer overflow in libavcodec/mpegvideo_parser.c in libav 11.8 allows remote attackers to cause a denial of service (crash) via a crafted file.

Frequently asked questions

What is CVE-2016-9821?: Integer overflow in libavcodec/mpegvideo_parser.c in libav 11.8 allows remote attackers to cause a denial of service (crash) via a crafted file.
How severe is CVE-2016-9821?: CVE-2016-9821 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2016-9821 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-9821?: CVE-2016-9821 affects Libav. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-9821?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-9821 published?: CVE-2016-9821 was published on 2017-03-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:libav:libav:11.8:*:*:*:*:*:*:*

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